Cable modem



FIG. 1 is a perspective view of a cable modem, showing my new design, in upright position, the broken line features in these and the following drawings being shown for illustrative purpose only;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a first side view thereof; and,

FIG. 7 is a second side view thereof. 

The ornamental design for a cable modem, as shown and described. 